Organic Reactions

Question 1

The addition of hydrogen to an alkane can also be classified as _____.

Answer 1

Reduction

Question 2

Describe two different reactions that could be used to produce propan-2-ol

Answer 2

Hydration of propene (+ H2O) Substitution of 2-halopropane (+ NaOH)

Question 3

Can tertiary alcohols be oxidised?

Answer 3

No

Question 4

Desribe a chemical test to distinguish hexane from hexene

Answer 4

Add bromine water, alkene becomes colourless first (without UV light)

Question 5

The condensation of a carboxylic acid and an amine produces which type of compound?

Answer 5

Amide

Question 6

Determine the products of the hydrolysis of ethyl propanoate

Answer 6

Ethanol and propanoic acid

Question 7

Describe how to test for a primary alcohol.

Answer 7

Add an ox agent (EG KMNO4) - it will change colour

Question 8

Determine the reactant needed to produce 2- fluoropentane from pent- 2-ene

Answer 8

HF

Question 9

Describe the products of the oxidation of a primary alcohol

Answer 9

Aldehyde then carboxylic acid

Question 10

Elimination
reactions produce
_____ compounds.

Answer 10

Unsaturated

Question 11

Haloalkanes can undergo
elimination or substitution when reacting with NaOH. Which conditions promote elimination?

Answer 11

High temp, conc NaOH, ethanol solvent

Question 12

Identify two differenet products of condensation reactions

Answer 12

Ester + amide

Question 13

Identfy two reaction types that produce amines

Answer 13

Reduction (of a nitrile) Substitution (of a haloalkane)

Question 14

Markovnikov’s rule applied to addition reactions with hydrogen halides says that..

Answer 14

the hydrogen atom will be added to the carbon with the greatest number of hydrogen atoms

Question 15

Identify the class of compound produced when a haloalkane undergoes substitution with ammonia (NH3)

Answer 15

Amine

Question 16

Name the product when 2-chlorobutane reacts with dilute NaOH at room temperature

Answer 16

Butan-2-ol

Question 17

Identify the products of complete combustion

Answer 17

Water and carbon dioxide

Question 18

Name the product when ethane reacts with chlorine (in UV light)

Answer 18

chloroethane

Question 19

Identify the reactant needed to produce hexanenitrile from 1- chloropentane

Answer 19

KCN

Question 20

Name the product
when water reacts
with but-1-ene

Answer 20

Butan-2-ol (Markovnikov’s rule)

Question 21

Name two common oxidising agents

Answer 21

dichromate (VI) / (Cr2O72-) permanganate / manganate (VII) / (MnO4)-

Question 22

What two classes of organic compounds react to form an ester?

Answer 22

An alcohol and a carboxylic acid

Question 23

True or false - amides are basic?

Answer 23

False

Question 24

What type of reaction do alkanes undergo?

Answer 24

Substitution

Question 25

What colour change is associated with the oxidation of an alcohol with potassium dichromate?

Answer 25

Organe to green

Question 26

Which class undergoes addition?

Answer 26

Alkenes

Question 27

What colour would you expect to see when potassium manganate (VII) is combined with a) propan-1- ol and b) methylpropan-2-ol

Answer 27

a) purple -> colourless / brown PPT b) purple (no change)

Question 28

What is produced when a secondary alcohol is oxidised?

Answer 28

A ketone